<template>
    <div>
        <!-- 面包屑导航区域 -->
       <el-breadcrumb separator-class="el-icon-arrow-right">
  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>数据统计</el-breadcrumb-item>
  <el-breadcrumb-item>数据报表</el-breadcrumb-item>
</el-breadcrumb> 
<!-- 卡片视图区域 -->

<el-card>
    <!-- 为echarts准备一个具备大小(宽高)的dom -->
    
    <div id="main" style="width:750px; height:400px;">
    </div>
</el-card>
    </div>
</template>
<script>
// 导入ecarts
import echarts from 'echarts'
import _ from 'lodash'
export default {
    data() {
    return {
      // 需要合并的数据
      options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
    }
  },
    created(){
// 此时，页面上的元素，已经被渲染完毕了
    },
async    mounted(){
// 3、基于准备好的dom，初始化echarts实例
var myChart=echarts.init(document.getElementById('main'))
const {data:res}=await this.$http.get('reports/type/1')
if(res.meta.status !==200){
    return this.$message.error('获取折线图数据失败！')
}
// 4、准备好数据和配置项
const result=_.merge(res.data,this.options)
// 5、展示数据
myChart.setOption(result)
    }
}
</script>
<style lang="less" scoped>

</style>